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  • 1
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    Unknown
    Hydrochemistry and Thorium 234 activity measured on water bottle samples during POLARSTERN cruise ANT-XX/2 (2011)
    PANGAEA
    Details
    Publication Date: 2023-03-16
    Keywords: ANT-XX/2; AWI_MarGeoChem; Calculated; Carbon, organic, particulate; Carbon dioxide; Chlorophyll a; Coulometry; CTD/Rosette; CTD-RO; Date/Time of event; DEPTH, water; Elevation of event; Event label; Fluorescence; Fluorometer, Seapoint; Indian Ocean; Latitude of event; Lazarev Sea; Longitude of event; Marine Geochemistry @ AWI; Nitrate; Nitrate and Nitrite; Nitrite; Non-destructive beta-counting (Rutgers van der Loeff & Moore, 1999); Oxygen; Oxygen, Winkler (Culberson, 1991, WOCE Report 68/91); Polarstern; PS63/021-1; PS63/022-2; PS63/023-1; PS63/024-1; PS63/025-1; PS63/026-2; PS63/027-1; PS63/028-1; PS63/029-1; PS63/030-5; PS63/031-1; PS63/032-1; PS63/033-4; PS63/034-1; PS63/035-1; PS63/036-2; PS63/037-3; PS63/038-3; PS63/039-1; PS63/040-1; PS63/041-3; PS63/042-3; PS63/043-1; PS63/044-1; PS63/046-1; PS63/047-1; PS63/048-1; PS63/049-1; PS63/050-1; PS63/052-1; PS63/053-1; PS63/054-4; PS63/055-3; PS63/056-1; PS63/057-1; PS63/058-1; PS63/059-1; PS63/060-1; PS63/061-4; PS63/062-4; PS63/063-1; PS63/064-2; PS63/065-1; PS63/070-1; PS63/071-1; PS63/072-1; PS63/073-1; PS63/075-1; PS63/076-3; PS63/077-1; PS63/078-1; PS63/079-3; PS63/080-1; PS63/081-2; PS63/082-1; PS63/083-1; PS63/085-1; PS63/086-1; PS63/087-1; PS63/088-1; PS63/089-1; PS63/090-1; PS63/091-1; PS63/092-1; PS63/093-1; PS63/094-1; PS63/095-1; PS63/100-1; PS63/101-1; PS63/104-1; PS63/107-2; PS63/116-1; PS63/119-1; PS63/120-2; PS63/121-2; PS63/122-1; PS63/123-2; PS63/124-1; PS63/125-1; PS63/126-1; PS63/127-1; PS63/128-1; PS63/130-1; PS63/131-1; PS63/133-1; PS63/134-1; PS63/135-1; PS63/137-1; PS63/138-1; PS63/140-1; PS63/141-1; PS63/142-1; PS63/143-1; PS63/144-1; PS63/145-1; PS63/147-1; PS63/148-1; PS63/149-1; PS63/150-1; PS63/152-1; PS63 06AQ200211_2; Riiser-Larsen Sea; Salinity; SBE19 self recording CTD; Seawater analysis after Grasshoff et al., 1983 (Verlag Chemie GmbH Weinheim); Silicate; South Atlantic Ocean; Temperature, water; Thorium-234, fraction of dissolved; Thorium-234, fraction of particulate; Thorium-234, total; Thorium-234/Uranium-238 activity ratio; Weddell Sea
    Type: Dataset
    Format: text/tab-separated-values, 21196 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 2
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    Physical oceanography during POLARSTERN cruise ANT-XX/2 (stations 182, 197 and 216)
    PANGAEA
    Details
    Publication Date: 2023-05-12
    Keywords: ANT-XX/2; AWI_MarGeoChem; Chlorophyll a; Computed; CTD; CTD/Rosette; CTD-RO; Date/Time of event; DEPTH, water; Elevation of event; Event label; Indian Ocean; Latitude of event; Longitude of event; Marine Geochemistry @ AWI; MULT; Multiple investigations; Polarstern; PS63/182-2; PS63/197-1; PS63/216-2; PS63 06AQ200211_2; Salinity; SBE19 self recording CTD; South Atlantic Ocean; Temperature, water
    Type: Dataset
    Format: text/tab-separated-values, 6888 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 3
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    Plankton abundance measured in surface water during Polarstern cruise ANT-XX/2 (2010)
    PANGAEA
    Details
    Publication Date: 2023-07-09
    Keywords: ANT-XX/2; Asteromphalus hookeri; Asteromphalus hyalinus; AWI_MarGeoChem; Chaetoceros aequatorialis; Chaetoceros atlanticus; Chaetoceros bulbosus; Chaetoceros castracanei; Chaetoceros convolutus; Chaetoceros criophilum; Chaetoceros debilis; Chaetoceros dichaeta; Ciliates, heterotrophic, naked; Corethron pennatum; Counting; CTD/Rosette; CTD-RO; Cylindrotheca closterium; Dactyliosolen antarcticus; Date/Time of event; DEPTH, water; Diatoms, pennales indeterminata; Dictyocha speculum; Dinoflagellates, naked; Dinoflagellates, thecate; Elevation of event; Event label; Fecal pellets; Fragilariopsis curta; Fragilariopsis cylindrus; Fragilariopsis kerguelensis; Fragilariopsis obliquecostata; Fragilariopsis rhombica; Fragilariopsis ritscheri; Fragilariopsis spp.; Guinardia cylindrus; Haslea trompii; Indian Ocean; Latitude of event; Longitude of event; Marine Geochemistry @ AWI; Membraneis imposter; MUC; MultiCorer; Pleurosigma sp.; Polarstern; Proboscia alata; Proboscia inermis; Proboscia truncata; Prorocentrum spp.; Protoperidinium spp., heterotrophic; PS63/048-1; PS63/054-5; PS63/095-3; PS63/112-4; PS63/121-2; PS63/127-1; PS63/139-2; PS63/143-2; PS63/146-1; PS63/152-1; PS63 06AQ200211_2; Pseudo-nitzschia heimii; Pseudo-nitzschia lineola; Pseudo-nitzschia turgiduloides; Rhizosolenia chunii; Rhizosolenia spp.; Riiser-Larsen Sea; South Atlantic Ocean; Thalassiosira gracilis; Thalassiosira lentiginosa; Thalassiosira oliverana; Thalassiosira spp.; Thalassiothrix antarctica; Tintinnids, heterotrophic; Weddell Sea
    Type: Dataset
    Format: text/tab-separated-values, 924 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 4
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    Estimated plankton abundance at station PS63/064-6 (2010)
    PANGAEA
    Details
    Publication Date: 2023-07-09
    Keywords: Abundance estimate; ANT-XX/2; Asteromphalus hookeri; Asteromphalus hyalinus; AWI_MarGeoChem; Chaetoceros aequatorialis; Chaetoceros atlanticus; Chaetoceros bulbosus; Chaetoceros castracanei; Chaetoceros convolutus; Chaetoceros criophilus; Chaetoceros debilis; Chaetoceros dichaeta; Ciliates, heterotrophic, naked; Corethron pennatum; Cylindrotheca closterium; Dactyliosolen antarcticus; DEPTH, water; Diatoms, pennales indeterminata; Dictyocha speculum; Dinoflagellates, naked; Dinoflagellates, thecate; Fecal pellets; Fragilariopsis curta; Fragilariopsis cylindrus; Fragilariopsis kerguelensis; Fragilariopsis obliquecostata; Fragilariopsis rhombica; Fragilariopsis ritscheri; Fragilariopsis spp.; Guinardia cylindrus; Haslea trompii; Marine Geochemistry @ AWI; Membraneis imposter; MIC; MiniCorer; Pleurosigma sp.; Polarstern; Proboscia alata; Proboscia inermis; Proboscia truncata; Prorocentrum spp.; Protoperidinium spp., heterotrophic; PS63/064-6; PS63 06AQ200211_2; Pseudo-nitzschia heimii; Pseudo-nitzschia lineola; Pseudo-nitzschia turgiduloides; Rhizosolenia chunii; Rhizosolenia spp.; South Atlantic Ocean; Thalassiosira gracilis; Thalassiosira lentiginosa; Thalassiosira oliverana; Thalassiosira spp.; Thalassiothrix antarctica; Tintinnids, heterotrophic
    Type: Dataset
    Format: text/tab-separated-values, 46 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 5
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    Biogeochemistry of the Eastern Weddell Gyre (2010)
    PANGAEA
    In:  Supplement to: Geibert, Walter; Assmy, Philipp; Bakker, Dorothee C E; Hanfland, Claudia; Hoppema, Mario; Pichevin, Laetitia; Schröder, Michael; Schwarz, Jill Nicola; Stimac, Ingrid; Usbeck, Regina; Webb, Adrian (2010): High productivity in an ice melting hot spot at the eastern boundary of the Weddell Gyre. Global Biogeochemical Cycles, 24, GB3007, https://doi.org/10.1029/2009GB003657
    Details
    Publication Date: 2023-10-28
    Description: The Southern Ocean (SO) plays a key role in modulating atmospheric CO2 via physical and biological processes. However, over much of the SO, biological activity is iron-limited. New in situ data from the Antarctic zone south of Africa in a region centered at -20°E - 25°E reveal a previously overlooked region of high primary production, comparable in size to the northwest African upwelling region. Here, sea ice together with enclosed icebergs is channeled by prevailing winds to the eastern boundary of the Weddell Gyre, where a sharp transition to warmer waters causes melting. This cumulative melting provides a steady source of iron, fuelling an intense phytoplankton bloom that is not fully captured by monthly satellite production estimates. These findings imply that future changes in sea-ice cover and dynamics could have a significant effect on carbon sequestration in the SO.
    Keywords: ANT-XX/2; AWI_MarGeoChem; CTD/Rosette; CTD-RO; Indian Ocean; Lazarev Sea; Marine Geochemistry @ AWI; MIC; MiniCorer; MUC; MULT; MultiCorer; Multiple investigations; Polarstern; Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas; PS63/021-1; PS63/022-2; PS63/023-1; PS63/024-1; PS63/025-1; PS63/026-2; PS63/027-1; PS63/028-1; PS63/029-1; PS63/030-5; PS63/031-1; PS63/032-1; PS63/033-4; PS63/034-1; PS63/035-1; PS63/036-2; PS63/037-3; PS63/038-3; PS63/039-1; PS63/040-1; PS63/041-3; PS63/042-3; PS63/043-1; PS63/044-1; PS63/046-1; PS63/047-1; PS63/048-1; PS63/049-1; PS63/050-1; PS63/052-1; PS63/053-1; PS63/054-4; PS63/054-5; PS63/055-3; PS63/056-1; PS63/057-1; PS63/058-1; PS63/059-1; PS63/060-1; PS63/061-4; PS63/062-4; PS63/063-1; PS63/064-2; PS63/064-6; PS63/065-1; PS63/070-1; PS63/071-1; PS63/072-1; PS63/073-1; PS63/075-1; PS63/076-3; PS63/077-1; PS63/078-1; PS63/079-3; PS63/080-1; PS63/081-2; PS63/082-1; PS63/083-1; PS63/083-2; PS63/085-1; PS63/086-1; PS63/087-1; PS63/088-1; PS63/089-1; PS63/090-1; PS63/091-1; PS63/092-1; PS63/093-1; PS63/094-1; PS63/095-1; PS63/095-3; PS63/100-1; PS63/101-1; PS63/104-1; PS63/107-2; PS63/112-4; PS63/116-1; PS63/119-1; PS63/120-2; PS63/121-2; PS63/122-1; PS63/123-2; PS63/124-1; PS63/125-1; PS63/126-1; PS63/127-1; PS63/128-1; PS63/130-1; PS63/131-1; PS63/133-1; PS63/134-1; PS63/135-1; PS63/137-1; PS63/138-1; PS63/139-2; PS63/140-1; PS63/141-1; PS63/142-1; PS63/143-1; PS63/143-2; PS63/144-1; PS63/145-1; PS63/146-1; PS63/147-1; PS63/148-1; PS63/149-1; PS63/150-1; PS63/152-1; PS63/182-2; PS63/197-1; PS63/216-2; PS63 06AQ200211_2; Riiser-Larsen Sea; South Atlantic Ocean; SPP1158; Weddell Sea
    Type: Dataset
    Format: application/zip, 5 datasets
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 6
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    Composition of centrifuge samples during Polarstern cruise ANT-XX/2 (2010)
    PANGAEA
    Details
    Publication Date: 2024-03-22
    Keywords: ANT-XX/2; AWI_MarGeoChem; Calculated; Calculated from conductivity; Carbon, organic, total; Carbon, total, particulate; Carbon, total, particulate, salt corrected; Carbon/Nitrogen ratio; Chlorophyll total; CTD/Rosette; CTD-RO; Date/Time of event; DEPTH, water; Element analyser CHN; Event label; Fluorometer, in-situ; ICP-OES, Inductively coupled plasma - optical emission spectrometry; Indian Ocean; Iron; Iron/Carbon ratio; Latitude of event; Longitude of event; Marine Geochemistry @ AWI; MIC; MiniCorer; MUC; MultiCorer; Nitrogen, total, particulate; Nitrogen, total, particulate, salt corrected; Opal, auto analysis (Müller & Schneider, 1993); Opal, biogenic silica, water free; Particle concentration; Polarstern; PS63/048-1; PS63/054-5; PS63/064-6; PS63/083-2; PS63/095-3; PS63/112-4; PS63/121-2; PS63/127-1; PS63/139-2; PS63/143-2; PS63/146-1; PS63/152-1; PS63 06AQ200211_2; Riiser-Larsen Sea; Salt content; Sample mass; Sample volume; Silica, particulate, salt corrected; South Atlantic Ocean; Sulfur, total, particulate; Weddell Sea
    Type: Dataset
    Format: text/tab-separated-values, 202 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 7
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    Concentrations of macronutrients, dissolved organic and inorganic compounds during the iron fertilization experiment EIFEX in 2004 (2023)
    PANGAEA
    Details
    Publication Date: 2024-03-23
    Description: Here we present the concentrations of inorganic nutrients, dissolved organic carbon, nitrogen and phophorus and dissolved inorganic carbon (DIC) from discrete water samples collected with a CTD-rosette during the European Iron Fertilization Experiment (EIFEX). The experiment was carried out from February 11 to March 20, 2004 in the 60-km diameter, rotating core of an eddy, formed by a meander of the Antarctic Polar Front (centred at around 49°10' S and 2°10' E). Samples were taken within the eddy inside and outside the fertilized patch, and in a few cases outside the eddy. Inorganic nutrients (silicate, phosphate, nitrate, nitrite and ammonium) were measured with a Technicon Autoanalyser II system using standard methods. Dissolved organic carbon (DOC) was determined by high temperature combustion using a TOC-VCPH/CPN (Shimadzu) according to Skoog et al. (1997). Dissolved organic nitrogen (DON) was measured on an Evolution continuous flow analyser (Alliance Instruments) after Valderrama (1981). Dissolved inorganic carbon was measured by coulometric titration (Johnson et al., 1987) using a SOMMA system with gas loop calibration with a reproducibility of 2 mmol/kg. DIC was calibrated against certified reference materials from Andrew Dickson at Scripps Institution of Oceanography (SIO).
    Keywords: Ammonium; ANT XXI/3; ANT-XXI/3; Auto-analyzer II, Technicon; Carbon, inorganic, dissolved; Carbon, organic, dissolved; Cast number; Continuous flow analyser, Alliance Instruments, Evolution; Method according to Valderrama (1981); Coulometric titration according to Johnson et al. (1987); CTD/Rosette; CTD-RO; DATE/TIME; DEPTH, water; dissolved in organic carbon (DIC); Dissolved Organic Matter; Duration, number of days; Event label; GOFLO; Go-Flo bottles; LATITUDE; LONGITUDE; Nitrate; Nitrite; Nitrogen, organic, dissolved; particulate organic matter; Phosphate; Polarstern; Position; PS65/424-3; PS65/424-8; PS65/426-1; PS65/427-1; PS65/452-1; PS65/464-1; PS65/466-2; PS65/470-1; PS65/471-1; PS65/508-16; PS65/508-2; PS65/509-1; PS65/509-13; PS65/511-1; PS65/511-9; PS65/513-3; PS65/513-5; PS65/514-2; PS65/514-6; PS65/515-1; PS65/516-1; PS65/517-1; PS65/518-1; PS65/519-1; PS65/520-1; PS65/521-1; PS65/522-1; PS65/523-1; PS65/524-1; PS65/525-1; PS65/526-1; PS65/527-1; PS65/528-1; PS65/529-1; PS65/530-1; PS65/531-1; PS65/532-1; PS65/533-1; PS65/534-1; PS65/535-1; PS65/536-1; PS65/537-1; PS65/538-1; PS65/539-1; PS65/540-1; PS65/541-1; PS65/543-10; PS65/543-14; PS65/543-15; PS65/543-8; PS65/544-11; PS65/544-14; PS65/544-18; PS65/544-24; PS65/544-29; PS65/544-35; PS65/544-42; PS65/544-48; PS65/544-5; PS65/544-53; PS65/544-56; PS65/544-60; PS65/544-63; PS65/544-7; PS65/544-9; PS65/545-1; PS65/546-14; PS65/546-2; PS65/546-5; PS65/553-10; PS65/553-3; PS65/553-5; PS65/559-1; PS65/570-11; PS65/570-2; PS65/570-4; PS65/570-7; PS65/572-1; PS65/573-1; PS65/574-1; PS65/580-10; PS65/580-2; PS65/580-4; PS65/580-6; PS65/581-1; PS65/583-1; PS65/584-1; PS65/585-1; PS65/587-1; PS65/587-10; PS65/587-3; PS65/588-1; PS65/591-1; PS65/591-3; PS65/592-1; PS65/593-12; PS65/593-3; PS65/593-6; PS65 EIFEX; Silicate; South Atlantic Ocean; Station label; Total organic carbon analyzer, Schimadzu, TOC-VCPH/CPN; HTCO method according to Skoog et al. (1997)
    Type: Dataset
    Format: text/tab-separated-values, 9707 data points
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  • 8
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    Thick-shelled, grazer-protected diatoms decouple ocean carbon and silicon cycles in the iron-limited Antarctic Circumpolar Current (2013)
    NATL ACAD SCIENCES
    In:  EPIC3Proceedings of the National Academy of Sciences of the United States of America, NATL ACAD SCIENCES, ISSN: 0027-8424
    Details
    Publication Date: 2017-10-04
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
    Format: application/pdf
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    PAPER (OA)
  • 9
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    Deep carbon export from a Southern Ocean iron-fertilized diatom bloom. (2012)
    Nature
    In:  EPIC3Nature, Nature, 487(7407), pp. 313-319
    Details
    Publication Date: 2019-07-16
    Description: Fertilization of the ocean by adding iron compounds has induced diatom-dominated phytoplankton blooms accompanied by considerable carbon dioxide drawdown in the ocean surface layer. However, because the fate of bloom biomass could not be adequately resolved in these experiments, the timescales of carbon sequestration from the atmosphere are uncertain. Here we report the results of a five-week experiment carried out in the closed core of a vertically coherent, mesoscale eddy of the Antarctic Circumpolar Current, during which we tracked sinking particles from the surface to the deep-sea floor. A large diatom bloom peaked in the fourth week after fertilization. This was followed by mass mortality of several diatom species that formed rapidly sinking, mucilaginous aggregates of entangled cells and chains. Taken together, multiple lines of evidence—although each with important uncertainties—lead us to conclude that at least half the bloom biomass sank far below a depth of 1,000 metres and that a substantial portion is likely to have reached the sea floor. Thus, iron-fertilized diatom blooms may sequester carbon for timescales of centuries in ocean bottom water and for longer in the sediments.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
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  • 10
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    Deep carbon export from a Southern Ocean iron-fertilized diatom bloom (2012)
    Nature Publishing Group
    In:  Nature, 487 (7407). pp. 313-319.
    Details
    Publication Date: 2019-09-23
    Description: Fertilization of the ocean by adding iron compounds has induced diatom-dominated phytoplankton blooms accompanied by considerable carbon dioxide drawdown in the ocean surface layer. However, because the fate of bloom biomass could not be adequately resolved in these experiments, the timescales of carbon sequestration from the atmosphere are uncertain. Here we report the results of a five-week experiment carried out in the closed core of a vertically coherent, mesoscale eddy of the Antarctic Circumpolar Current, during which we tracked sinking particles from the surface to the deep-sea floor. A large diatom bloom peaked in the fourth week after fertilization. This was followed by mass mortality of several diatom species that formed rapidly sinking, mucilaginous aggregates of entangled cells and chains. Taken together, multiple lines of evidence—although each with important uncertainties—lead us to conclude that at least half the bloom biomass sank far below a depth of 1,000 metres and that a substantial portion is likely to have reached the sea floor. Thus, iron-fertilized diatom blooms may sequester carbon for timescales of centuries in ocean bottom water and for longer in the sediments.
    Type: Article , PeerReviewed
    Format: text
    Format: text
    Format: text
    DOI: 10.1038/nature11229
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    OceanRep: Article in a Scientific Journal - peer-reviewed
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